Process for making waterproof wood-pulp or jute boards and the product thereof.



PATENTED JUNE 2, 1908.

v 0.1a. JAMESON. PROCESS FOR MAKING WATERPROOF WOOD PULP 0R JUTE BOARDSAND THE PRODUCT THEREOF.

APPLI ATIO I'ILRD 00m. 19,1906.

WITNESSES:

& T Off 'rRocEss FOR MAKING weTE'nPRooF wool)- j I To all whom it'mayconcern:

a citizen of theUnited'States of America, re-

of said process. I

Boards and the Product Thereof; and I (hereby. declare the following tobe afull,-

thanroofing material ofthis class now on the sheets together. Fig. 3represents the fin- UNITED STATES PAT NT oFrnoE.

.cHAnLE s' B. IJAlHESOhl, IORMANSFIELD, onto.

PULP (5R; Jeri: BOARDS Ann ,THE rnonuer no. 889,235. I

" Be it known that I, OnAnLEsB. J AirnsoN,

siding at Mansfield,in'thecountyof Richland and-State'of Ohio; haveinvented certain new and useful Improvements in Processes for MakingVVaterproof VVood- Pulp, or Jute clear, and exact'descriptionof theinvention, such as will enable others skilled-in the artto whichitpertains to makeand use the same.

This invention relates to an improved process for making water-proofwood pulp or jute boards.

The object of this invention is to produce a new water-proof roofingmaterial which will be more impervious to moisture and stronger marketand which factured.

My invention consists in cementing together two or more sheets or layersof wood puIp boards or similar material by means of a exible water proofadhesive .substance holding same under pressure until practically dry,forming in hot dies the edges thereof for joints, and finally treatingthe surfaces of said product with a coating of a water-proof semi fluidsubstance, such as a siccative oil.

My invention also consists in the product may be cheaply 1nanu-.

In the accompanying drawings Figure 1 represents the sheets of wood pulpor jute before they are cemented together. Fig. 2 re resents the boardformed by cementing tie ished product. Fig. 4 is an end view of thefinished product.

In carrying out my process I take wood pulp or jute boards or sheets aand b of the desired size and cover one side of one of said boards orsheets with a coating of flexible I water-proof cement and allow thiscoating of cement to become partially dry but before it has become dryand while in a condition of tackiness I bring the other sheet in contactwith the coated surface thereof and innnedi- I ately thereafter placethe sheets in a press where I hold them tightly pressed together untilthe cementing materia has thoroughly i I I I S pec ificationq of LettersPatent. I

- Application filed October 19, 1906..- Serial No, 339,606.

' bound together and indurated than Patented June 2, 1908.

up and down joints (1 adapted overlap the edges of adjacent sheets andto rest on and cover strips of -wood previously ap lied-to the roofsurface, by whichthe ovefl I and formed joint portions of the sheets are'IEtlSGtl above, the general plane of the'roofapping surface to whichthey are applied, which prevents the rain fromseeping into the up anddown joints.

Subsequently to the forming ofthesheets they are 'wat'er-proofed bysaturating the sheets (preferably by dipping) witha' drying oil compoundafter which the sheets are thor-' oughly dried when the sheets will befound to be hardened and stiffened and also rendered impervious tomoisture. The sheets may 1 then be painted any color desired.

If for any reason extra thick sheets are required I use additionalsheets under the process specified above until the required thickness,is obtainedl However, I have found that two layersor sheets of wood pulpor jute board puttogether by my improved process, as described above,are greatly superior to any roofing sheets heretofore roduced; .lyingflatter on the sheathing standing the effects of moisture and of hot sunbetter and less affected by the handling during transportation and whileplacing on roofs. By using wood pulp sheets of the thickness I use Ihave sheets with fewer defects than in the thicker sheets, being in twolayers slight mechanical defects in the sepaoards, withrate sheets haveno injurious effect on the completed roofing. By the layer ofwaterproofing cement between the layers of the wood pulp board thesaturating or permeating effect of long continued rains even ifaffecting the'outer layer must necessarily be stopped by the water-proofcement which being protected from injurious action of the weather by theoutside layer is better able 1 to withstand the moisture than the cementon the exterior of the sheets. =This effect is enhanced by the fact thatmy cement and saturating fluid have as a basls a drying Oll of the samegeneral character, which pro-' duees a product of more uniform texture,'

more thoroughly and permanently saturated, can be otherwise obtained.

That I claim is: 1. The process of manufacturing a waterproof roofcovering consisting in cementing together two or more sheets of woodpulp or 110 jute board by means of a water proof adhe sive, then dryingthe same and subsequently hardemn the same bysaturation with Water-prooslccatlve. fluid s bstanoe followed "by'coinplete drying, the b sis ofthe cement proof roo covering consisting in cementing together two ormore wood pulp -or jute, I

boards by "means of a water-proof adhesive, then drying the same andforming thefedges with two bends by which tb le material adj acent theedges-occupies a p ane above that of the general surface of the body of'the sheets, and subsequently hardening the same plete drying, the basisof' the cement and Waterproof siccative fluid being a drying oil. heproduct of above process for covering roof'sconsisting of a plurality oflayers of A Woodfpulpor jute boards united by'waterroof cement to form asolid board hardened y saturation with water-proof sicoative materialand subsequent drying, the basis of the cement and waterproof siccativefluid beingI-a-drying oil. 7 p

' 4'; The product ofabove process for covering roofs consisting of aplurality .of layers of wood pulp or jute boards united bywaterroofcement to forrh a solid board hardened y saturationwith water 'proofsiccative material and subsequent drying, the edges being formed foroverlapping with a portion'adjacent to the edges'in a plane above thelane occupied by the body. of the sheet', the as is of the cement andwaterproof siccatlv'e fluid being a drying oil. throughout by saturationwith water-proof siccative fluid substance followed by com- In testimonywhereof,- I sign the foregoing specification, in the presence of twowitnesses.

CHARLES B. JAMESON.

Witnesses:

V1c'ron C. LYNCH, N. L M DONnELL.

